GridView行编辑、更新、取消、删除事件用法

注意：当启用编辑按钮时，点击编辑按钮后会使一整行都切换成文本框。为了是一行中的一部分是文本框，需要把以整行的所有列都转换成模板，然后删掉编辑模板中的代码。这样就能使你想编辑的列转换成文本框。

1.界面

<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"

GridLines="None" AutoGenerateColumns="False" DataKeyNames="ProductID"

onrowdatabound="GridView1_RowDataBound" AllowPaging="True"

onpageindexchanging="GridView1_PageIndexChanging"

onrowcommand="GridView1_RowCommand"

onrowcancelingedit="GridView1_RowCancelingEdit"

onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating"

onrowdeleting="GridView1_RowDeleting">

<PagerSettings FirstPageText="首页" LastPageText="尾页"

Mode="NextPreviousFirstLast" NextPageText="下一页" PreviousPageText="上一页" />

<RowStyle BackColor="#E3EAEB" />

<Columns>

<asp:TemplateField HeaderText="ProductID">

<ItemTemplate>

<asp:Label ID="Label2" runat="server" Text='<%# Bind("ProductID") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="ProductName">

<EditItemTemplate>

<asp:TextBox ID="txtName" runat="server" Text='<%# Bind("ProductName") %>'></asp:TextBox>

</EditItemTemplate>

<ItemTemplate>

<asp:Label ID="Label1" runat="server" Text='<%# Bind("ProductName") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="UnitPrice">

<ItemTemplate>

<asp:Label ID="Label3" runat="server" Text='<%# Bind("UnitPrice") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="操">

<ItemTemplate>

<asp:LinkButton ID="del" runat="server" OnClientClick="return confirm('您确定要删除吗？')" CommandName="dell" >删除</asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

<asp:CommandField ShowEditButton="True" HeaderText="作">

<HeaderStyle HorizontalAlign="Center" />

<ItemStyle HorizontalAlign="Center" Width="85px" ForeColor="Blue" />

</asp:CommandField>

</Columns>

<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White"

HorizontalAlign="Right" />

<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />

<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />

<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />

<EditRowStyle BackColor="#7C6F57" />

<AlternatingRowStyle BackColor="White" />

</asp:GridView>

2.前台操控调用业务

DalBll db = new DalBll();

static List<Products> tmpList = new List<Products>();

protected void Page_Load(object sender, EventArgs e)

{

if(!IsPostBack)

{

InitGridView();

}

}

private void InitGridView()

{

tmpList = db.GetDataList();

this.GridView1.DataSource = tmpList;

this.GridView1.DataBind();

}

//绑定数据时触发

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

Products tmp = e.Row.DataItem as Products;

LinkButton lbtn = e.Row.FindControl("del") as LinkButton;

if (lbtn != null && tmp != null)

lbtn.CommandArgument = tmp.ProductID.ToString();//绑定主键

}

}

//删除数据

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

{

if (e.CommandName == "dell")

{

int productID = Convert.ToInt32(e.CommandArgument);

db.Del(productID);

}

}

//分页

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

this.GridView1.PageIndex = e.NewPageIndex;

InitGridView();

}

//切换到编辑模式

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

{

this.GridView1.EditIndex = e.NewEditIndex;

InitGridView();

}

//取消

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

{

this.GridView1.EditIndex = -1;

InitGridView();

}

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

{

//获取当前页索引

int i = this.GridView1.EditIndex;

//获取文本框的值

string productsName = ((TextBox)(this.GridView1.Rows[i].FindControl("txtName"))).Text.ToString();

DataKey key = this.GridView1.DataKeys[e.RowIndex];

int id = Convert.ToInt32(key[0].ToString());

//首先找到该对象

Products tmp = tmpList.Where(c => c.ProductID == id).First();

tmp.ProductName = productsName;

db.Update(tmp);

InitGridView();

}

3.各操作数据的代码

public class DalBll

{

NorthwindEntities db = new NorthwindEntities();

public List<Products> GetDataList()

{

return db.Products.ToList();

}

public void Del(int productID)

{

Products tmp = db.Products.Where(c=>c.ProductID==productID).First();

db.DeleteObject(tmp);

db.SaveChanges();

}

public void Update(Products tmp)

{

//为参数对象创建实体键

EntityKey key;

object originalProductObj;

//因参数对象不属于上下文，因此为该参数对象创建上下文实体键

key = db.CreateEntityKey("Products", tmp);

db.TryGetObjectByKey(key, out originalProductObj);

db.ApplyPropertyChanges(key.EntitySetName, tmp);

db.SaveChanges();

}